1 /* init_main.c 4.43 82/11/13 */ 2 3 #include "../h/param.h" 4 #include "../h/systm.h" 5 #include "../h/dir.h" 6 #include "../h/user.h" 7 #include "../h/kernel.h" 8 #include "../h/fs.h" 9 #include "../h/mount.h" 10 #include "../h/map.h" 11 #include "../h/proc.h" 12 #include "../h/inode.h" 13 #include "../h/seg.h" 14 #include "../h/conf.h" 15 #include "../h/buf.h" 16 #include "../h/pte.h" 17 #include "../h/vm.h" 18 #include "../h/cmap.h" 19 #include "../h/text.h" 20 #include "../h/clist.h" 21 #ifdef INET 22 #include "../h/protosw.h" 23 #endif 24 #include "../h/quota.h" 25 26 extern struct user u; /* have to declare it somewhere! */ 27 /* 28 * Initialization code. 29 * Called from cold start routine as 30 * soon as a stack and segmentation 31 * have been established. 32 * Functions: 33 * clear and free user core 34 * turn on clock 35 * hand craft 0th process 36 * call all initialization routines 37 * fork - process 0 to schedule 38 * - process 2 to page out 39 * - process 1 execute bootstrap 40 * 41 * loop at loc 13 (0xd) in user mode -- /etc/init 42 * cannot be executed. 43 */ 44 #ifdef vax 45 main(firstaddr) 46 int firstaddr; 47 #endif 48 #ifdef sun 49 main(regs) 50 struct regs regs; 51 #endif 52 { 53 register int i; 54 register struct proc *p; 55 struct fs *fs; 56 int s; 57 58 rqinit(); 59 #include "loop.h" 60 #ifdef vax 61 startup(firstaddr); 62 #endif 63 #ifdef sun 64 startup(); 65 #endif 66 67 /* 68 * set up system process 0 (swapper) 69 */ 70 p = &proc[0]; 71 p->p_p0br = u.u_pcb.pcb_p0br; 72 p->p_szpt = 1; 73 p->p_addr = uaddr(p); 74 p->p_stat = SRUN; 75 p->p_flag |= SLOAD|SSYS; 76 p->p_nice = NZERO; 77 setredzone(p->p_addr, (caddr_t)&u); 78 u.u_procp = p; 79 #ifdef sun 80 u.u_ar0 = ®s.r0; 81 #endif 82 u.u_cmask = CMASK; 83 for (i = 1; i < NGROUPS; i++) 84 u.u_groups[i] = -1; 85 for (i = 0; i < sizeof(u.u_rlimit)/sizeof(u.u_rlimit[0]); i++) 86 u.u_rlimit[i].rlim_cur = u.u_rlimit[i].rlim_max = 87 RLIM_INFINITY; 88 u.u_rlimit[RLIMIT_STACK].rlim_cur = 512*1024; 89 u.u_rlimit[RLIMIT_STACK].rlim_max = ctob(MAXDSIZ); 90 u.u_rlimit[RLIMIT_DATA].rlim_max = 91 u.u_rlimit[RLIMIT_DATA].rlim_cur = ctob(MAXDSIZ); 92 p->p_maxrss = RLIM_INFINITY/NBPG; 93 #ifdef QUOTA 94 qtinit(); 95 p->p_quota = u.u_quota = getquota(0, 0, Q_NDQ); 96 #endif 97 startrtclock(); 98 99 /* 100 * Initialize tables, protocols, and set up well-known inodes. 101 */ 102 mbinit(); 103 cinit(); /* needed by dmc-11 driver */ 104 #ifdef INET 105 #if NLOOP > 0 106 loattach(); /* XXX */ 107 #endif 108 /* 109 * Block reception of incoming packets 110 * until protocols have been initialized. 111 */ 112 s = splimp(); 113 ifinit(); 114 #endif 115 domaininit(); 116 #ifdef INET 117 splx(s); 118 #endif 119 ihinit(); 120 bhinit(); 121 binit(); 122 bswinit(); 123 #ifdef GPROF 124 kmstartup(); 125 #endif 126 127 fs = mountfs(rootdev, 0, (struct inode *)0); 128 if (fs == 0) 129 panic("iinit"); 130 bcopy("/", fs->fs_fsmnt, 2); 131 132 inittodr(fs->fs_time); 133 boottime = time; 134 135 /* kick off timeout driven events by calling first time */ 136 roundrobin(); 137 schedcpu(); 138 schedpaging(); 139 140 /* set up the root file system */ 141 rootdir = iget(rootdev, fs, (ino_t)ROOTINO); 142 iunlock(rootdir); 143 u.u_cdir = iget(rootdev, fs, (ino_t)ROOTINO); 144 iunlock(u.u_cdir); 145 u.u_rdir = NULL; 146 147 u.u_dmap = zdmap; 148 u.u_smap = zdmap; 149 150 /* 151 * Set the scan rate and other parameters of the paging subsystem. 152 */ 153 setupclock(); 154 155 /* 156 * make page-out daemon (process 2) 157 * the daemon has ctopt(nswbuf*CLSIZE*KLMAX) pages of page 158 * table so that it can map dirty pages into 159 * its address space during asychronous pushes. 160 */ 161 mpid = 1; 162 proc[0].p_szpt = clrnd(ctopt(nswbuf*CLSIZE*KLMAX + UPAGES)); 163 proc[1].p_stat = SZOMB; /* force it to be in proc slot 2 */ 164 if (newproc(0)) { 165 proc[2].p_flag |= SLOAD|SSYS; 166 proc[2].p_dsize = u.u_dsize = nswbuf*CLSIZE*KLMAX; 167 #ifdef NOPAGING 168 for (;;) 169 sleep((caddr_t)&u, PSLEP); 170 #else 171 pageout(); 172 /*NOTREACHED*/ 173 #endif 174 } 175 176 /* 177 * make init process and 178 * enter scheduling loop 179 */ 180 181 mpid = 0; 182 proc[1].p_stat = 0; 183 proc[0].p_szpt = CLSIZE; 184 if (newproc(0)) { 185 #ifdef vax 186 expand(clrnd((int)btoc(szicode)), 0); 187 (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); 188 (void) copyout((caddr_t)icode, (caddr_t)0, (unsigned)szicode); 189 #endif 190 #ifdef sun 191 icode(); 192 usetup(); 193 regs.r_context = u.u_pcb.pcb_ctx->ctx_context; 194 #endif 195 /* 196 * Return goes to loc. 0 of user init 197 * code just copied out. 198 */ 199 return; 200 } 201 #ifdef MUSH 202 /* 203 * start MUSH daemon 204 * pid == 3 205 */ 206 if (newproc(0)) { 207 expand(clrnd((int)btoc(szmcode)), 0); 208 (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); 209 (void) copyout((caddr_t)mcode, (caddr_t)0, (unsigned)szmcode); 210 /* 211 * Return goes to loc. 0 of user mush 212 * code just copied out. 213 */ 214 return; 215 } 216 #endif 217 proc[0].p_szpt = 1; 218 sched(); 219 } 220 221 /* 222 * Initialize hash links for buffers. 223 */ 224 bhinit() 225 { 226 register int i; 227 register struct bufhd *bp; 228 229 for (bp = bufhash, i = 0; i < BUFHSZ; i++, bp++) 230 bp->b_forw = bp->b_back = (struct buf *)bp; 231 } 232 233 /* 234 * Initialize the buffer I/O system by freeing 235 * all buffers and setting all device buffer lists to empty. 236 */ 237 binit() 238 { 239 register struct buf *bp, *dp; 240 register int i; 241 struct swdevt *swp; 242 243 for (dp = bfreelist; dp < &bfreelist[BQUEUES]; dp++) { 244 dp->b_forw = dp->b_back = dp->av_forw = dp->av_back = dp; 245 dp->b_flags = B_HEAD; 246 } 247 dp = &bfreelist[BQ_AGE]; 248 for (i = 0; i < nbuf; i++) { 249 bp = &buf[i]; 250 bp->b_dev = NODEV; 251 bp->b_bcount = 0; 252 bp->b_un.b_addr = buffers + i * MAXBSIZE; 253 bp->b_bufsize = 2 * CLBYTES; 254 bp->b_back = dp; 255 bp->b_forw = dp->b_forw; 256 dp->b_forw->b_back = bp; 257 dp->b_forw = bp; 258 bp->b_flags = B_BUSY|B_INVAL; 259 brelse(bp); 260 } 261 /* 262 * Count swap devices, and adjust total swap space available. 263 * Some of this space will not be available until a vswapon() 264 * system is issued, usually when the system goes multi-user. 265 */ 266 nswdev = 0; 267 for (swp = swdevt; swp->sw_dev; swp++) 268 nswdev++; 269 if (nswdev == 0) 270 panic("binit"); 271 if (nswdev > 1) 272 nswap = (nswap/DMMAX)*DMMAX; 273 nswap *= nswdev; 274 maxpgio *= nswdev; 275 swfree(0); 276 } 277 278 /* 279 * Initialize linked list of free swap 280 * headers. These do not actually point 281 * to buffers, but rather to pages that 282 * are being swapped in and out. 283 */ 284 bswinit() 285 { 286 register int i; 287 register struct buf *sp = swbuf; 288 289 bswlist.av_forw = sp; 290 for (i=0; i<nswbuf-1; i++, sp++) 291 sp->av_forw = sp+1; 292 sp->av_forw = NULL; 293 } 294 295 /* 296 * Initialize clist by freeing all character blocks, then count 297 * number of character devices. (Once-only routine) 298 */ 299 cinit() 300 { 301 register int ccp; 302 register struct cblock *cp; 303 304 ccp = (int)cfree; 305 ccp = (ccp+CROUND) & ~CROUND; 306 for(cp=(struct cblock *)ccp; cp < &cfree[nclist-1]; cp++) { 307 cp->c_next = cfreelist; 308 cfreelist = cp; 309 cfreecount += CBSIZE; 310 } 311 } 312